Overview
ISO 8044:2024 - "Corrosion of metals and alloys - Vocabulary" is the sixth edition of the international vocabulary standard that establishes clear, harmonized definitions for corrosion-related terms used across science, engineering and industry. The document defines key concepts (for example, corrosion, corrosion rate, corrosion system, corrosion damage), applies IUPAC rules for electrode potential signs, and treats the term metal to include alloys and other metallic materials. It replaces ISO 8044:2020 and includes updated definitions and editorial clarifications to improve consistency in technical communication.
Key topics and technical scope
The standard focuses on terminology rather than test procedures or performance criteria. Major topic groups covered include:
- General corrosion terminology: corrosion, corrosive agent, corrosivity, corrosion effect, corrosion damage, corrosion rate, service life, durability, critical humidity.
- Types of corrosion: electrochemical vs chemical corrosion, atmospheric, marine, underground, localized corrosion (pitting, crevice, galvanic/bimetallic, intergranular, selective dealloying such as dezincification and graphitic corrosion), erosion and cavitation corrosion.
- Corrosion protection and surface treatment: vocabulary for protection concepts (note: inorganic surface treatment terms are referenced in ISO 2080).
- Corrosion testing and electrochemical matters: definitions related to electrochemical cells, reaction rates, passivation, electrochemical protection, impressed/current stray-current corrosion, electrochemical corrosion tests, threshold stress and stress corrosion cracking (K_ISCC).
- Supplementary materials: informative annex with graphical representations, bibliography and index for cross-referencing.
Practical applications
ISO 8044:2024 is used to ensure consistent language and reduce ambiguity when specifying, testing, reporting and discussing corrosion matters. Typical uses include:
- Producing unambiguous test reports and inspection records that reference corrosion rate, pitting, crevice corrosion or time of wetness.
- Writing material specifications, procurement documents and engineering designs where clear definitions of serviceability, durability and corrosion damage are needed.
- Preparing standards, technical guidance and training materials for corrosion testing laboratories and coatings manufacturers.
- Harmonizing terms across multidisciplinary teams (materials scientists, corrosion engineers, electrochemists, and asset owners).
Who should use ISO 8044:2024
- Corrosion engineers and materials scientists
- Testing and inspection laboratories
- Standards writers and technical committees (ISO/TC 156)
- Coatings and corrosion protection manufacturers
- Asset owners, infrastructure and pipeline operators
- Educators and researchers in corrosion science
Related standards and resources
- ISO 2080 - terms for inorganic surface treatment of metals
- ISO Online Browsing Platform and IEC Electropedia - central terminology resources
- Produced by ISO/TC 156 (Corrosion of metals and alloys)
By standardizing corrosion vocabulary, ISO 8044:2024 improves clarity in specifications, testing, reporting and interdisciplinary communication - making it an essential reference for anyone working with metal corrosion, corrosion testing, and protection strategies.